Method of forming sheet metal bearing cup with external restraining flange



0 1 J.:H. COWLES 3,3 8,511.

, METHOD OF FORMING SHEET METAL BEARING CUP WITH EXTERNAL RESTRAINING FLANGE Filed June 25, 1964 2 Sheets-Sheet 1 \Ly INVENTOR JoHu H. CowL s BY y I v TTORNFS.

Oct. 24, 1967 'J. H. COWLES 3,343,511

METHOD OF FORMING SHEET METAL BEARING CUP WITH EXTERNAL RESTRAINING FLANGE Filed June 25, 1964 2 Sheets-Sheet 2 United States Patent This inventiohrelates'ingeneral to'new'and useful provements in bearing manufacture, and more particular- 1y to a novel method-of forming a bearing cup,

The primarybbje'ctbf this invention is to"p'rovide"a novel methodbf'forming a one-piece, sheet rnetalbe'aiing cup 'ha'v'ing an external restraining flange 'in"addition" a the two usual roller retaining'fl'anges at the opposite ends thereof, the method incliiding the steps of forming a cup which includes a bottom wall and a imon'thportion 'lof enlarged diameter" connected to the remaindef dfth'ecuii by an offset intermediate portion,removinga major per tionof the bottom wall 'to define a'first retaining flange, and' then foldingover the "large "mouth portionto define both a second retaining flange and a revers'ely folded part of which the intermediate portion'is a part, the intermediate portion now becoming the desired re straining flan e; j Another object of thisinvention is to provide a novel method of forming a sheet metal bearing-cup of the type having a cylindrical body with roller retaining flanges inwardly directed at the opposite'ends thereof and an outwardly directed cup restraining flange adjacent one en thereof, the 'method comprising the ste'ps of providing a fiat blank, drawing the flatfblank into cup form, and then reshaping the opposite ends of the cup' to define the bear ing cup in question. g i v I Still another-object of this invention is to provide at one end of a sleeve or c'npan outwardly direc'ted restrain ing'flange and an inwardly directed retainingfiange dis posed in opposed face 'to-face relation,- the method in cluding the steps of 'forming a sleeve hf cup with 'an end portion of a large diameter'as compared to the remainder of the sleeve'and connected to the remaindero'fth'e sleeve by an intermediate portion disposed substantially' normal to the axis of the sleeve, and-then folding inwardly the end portion of increased diameter to define an inwardly directed retaining flange wtih'the intermediate portion now forming an outwardly projecting'restrainingflange.

A further object o'fthis invention is to provide a novel method wherein a bearing cup for rollers having bearing retaining flanges at opposite ends thereof 'andi'an outwardly directed restraining flange adjacent one end in'a" series of automatic punchingsteps which may beperformed by existingpunch press machiner With the above and other objects in view-thatwilFher einafter appear, the na'tureof the invention willbembre clearly understood by reference to' the followingdetailed description, the appended c'laims and the several views illustrated in the accompanyin'g drawing.

Inthe drawingz" i FIGURE 1 is a perspective view with portions broken away of-a bearing cup formed in accordance with this inventiona I a FIGURE '2' "is a fragmentary,sectional view talien throngh a' first operating station offal punch 'pfess showing the manner in "which a'blank is punched from aish eet or IT' "3;": I

FIGURE 3 is a blank-being initially cupped.- a FIGURE 4 is a fragmentary sectional view showing a redrawing of the-cup to a. smaller diameter. 1

FIGURE 5 is a fragmentary sectionallview' showing the drawing to size of the lower end of the cup.

fragmentary sectionalvi'ewshowingthe Patented Oct. 24, 1967 FlGURE'G is a fragmentary sectional view showing the squaring'of the shoulder of the upper portion, of the P9 .1 FIGURE 7 is a fragmentary vertical sectional view showing the bottom of the cup being pierced out isia fragmentary vertical sectional view showing the upp erend of the cup being re-drawn to an accurate dimension. .j p 1 9 is a fragmentary vertical sectional view showing the waste at the upper end, of the cup ,being clipped off;

ice

10 is a fragrnentary vertical sectional view showing the 'shoulders between the small diameter and the r e fisnq fihe s bei q a d- 4 W FIGURE 11 is a fragmentary vertical sectional view showing the large diameter portion of the cup being folded FhG URE lZ is a fragmentary vertical, sectional view showing the flattening of the resultant inwardly directed retaining flange against the restrainingflange ofthe bear- P-ffp .Referring now to the drawings in detail, it will be seen that there is illustrated inF IGURE l abearing cup which is to be formed in accordance with this invention, the hearing cup being generally referred .to by the numeral 20. The bearing .cup 20 includes a cylindrical body 21 which is provided atone .end with a roller retaining flange 22. 'At the oppos'iteendof the cylindrical body 21, the bearing cnp ztl isprovided withan outwardly directed bearingcup restraining flange 23. At the outer edge of the restraining flange 23 .ther e. is areversely curved portion 24 to which there is integrally connected an inwardly di rect'ed roller retaining flange 25. h h I the p m a o t h a a cup she tmetal is provided in strip form with the metalstripheing illustrated in FIGURE 2 and being referred to by the numeral 2 6. The metal strip 26 is fed into a blanking die unit,-gen erally referred .to by the numeral 27, of a punch press. The blanking die unit 27 includes a lower die 28 having an upper corner 29 which defines a shearing edge. A vertically' movable strip clampor hold down 30 is aligned with the die 28 above the path of feed of th estrip 26. The hold down 30 has associated therewith apunch 31 which is provided at the bottom thereof with ja sharp corner 32. The -corner 32.defines a shearing edge which cooperates with the'shearing edge defined by ,the corner 29 to blank out a cylindrical blank. 7 j a h s t After th e blank has beenforme d from the strip 26, it is then fed into a die unit at a second station of the punch press, the die unit being generally, referred to by the m1- meral33. Thedie nnit 33 includes a die, holder 34 in whichthere is mounted a replaceable die 3,5, The die 35 has a ylindrical bore 36 which is flared at the upper end thereof by the forming of a r-oundedcorner 37 on the die 35. t. Y Q

The dieunitjfa also includes a verticallyreciprocable hold down 38 which is of atubular construction and'which h a punch 40mqvab ec h rs hwq ht n1 -Qf th die unitfiS, the blank fo rmed from thestrip zo is positioned in alignment with the die 35, after which the hold down 38 and'thepunch 40. move downwardly in unison with the hold down 38 lightly gripping the blank so as to permit limited sliding movement'thereof between'the hold wn Sfifin theme 1 -..Th. Q a r r vma t 1 hold ,down, 38 stops injheposition shqwnin liLG URE 3 whiletthe downward movement of the punch 40 contin ie's with the punchj40 performinganinitial c ippingopera than an the bl n vthereby aki a a bl nk .a s ii m fQrm d,--

t h cup shaped blank element 41 is transferred to a, third diellinit, which isl geneirallyreifer'red tdhy the nu; meral 42. The the unit 42 includes a die holder 43' in 3 which ,thereis mounted a die 44. The die 44 is very similar in construction to the die35, but has a bore 45 therethrough of a lesser diameter than the bore 36. Like the die 35, the die 44 has a rounded upper corner 46.

The die unit 42 also includes a tubular stripper 47 through which there passes a punch 48. The stripper 47 and the punch 48 are movable relative to the die 44 as is generally indicated by the arrows. The punch 48 is of a shape to cooperate with the die 44 in a manner wherein the cup shaped blank 41 is re-drawn so as-to be of a lesser diameter and a greater depth. The re-drawn blank 41, due to the reduction in the diameter thereof and the fact that the blank 41 is not forced entirely into the bore 45 of the die 44, is provided at the upper end thereof with a large diameter portion 49 which is connected to the remainder of the re-drawn blank 41 by an intermediate portion 50.

The re-drawn cup shaped blank 41 is then transferred to a die unit which is generally referred to by the numeral 51. The die unit 51 includes a die holder 52 in which there is mounted a die 53. The die 53 has a bore 54 therethrough of a lesser diameter than the bore 45 of the die 44, and is provided at the upper end thereof with a round ed corner 55.

The die unit 51 also includes a punch 56 which is aligned with the bore 54 of the die 53. The punch 56 passes through a tubular stripper 57 and the punch 56 and the stripper 57 are mounted for reciprocatory movement, as is indicated by the arrows. The punch 56 cooperates with the die 53 to further re-draw the cup shaped blank 41 and to square up the intersection of the bottom of the cup shaped blank with the cylindrical side wall thereof. It will be also noted that the punch 56 has an intermediate enlargement 58 which cooperates with the corner 55 of the die 53 to reshape the intermediate portion 50 of the blank 41. The reshaping of the intermediate portion 50 also results in a slight reshaping of the large diameter portion 49.

Following the re-drawing and squaring up of the blank 41 in the die unit 51, the blank 41 is transferred to a die unit which is generally referred to by the numeral 60. The die unit 60 includes a die holder 61 in which there is mounted a die 62. The die 62 has a bore 63 therethrough of a size to snugly receive the cup shaped blank 41 Without further re-drawing thereof to any material degree. It is to be noted that the die 62 has a substantially square upper corner 64 as compared to the rounded corners .of the dies 35, 44 and 53.

The die unit 60 also includes a punch 65 which is mounted for reciprocatory movement within a stripper 66. The stripper 66 is also mounted for reciprocatory movement. The punch 65 has a lower portion 67 of a diameter to be snugly received within the cup shaped blank 41. The punch 65 also has an upper portion 68 of a larger diameter so as to define a downwardly facing annular shoulder 69. The shoulder 69 engages the intermediate portion 50 of the blank 41 and in cooperation with the upper end of .the die 62 folds the intermediate portion 50 around to a position whereby it lies in a plane disposed normal to the axis of the cup shaped blank 41.

The cup shaped blank 41 is next transferred to a die unit which is generally referred to by the numeral 70. The die unit 70 includes a die holder 71 in which there is positioned a die 72. The die 72 has a bore 73 therethrough of a diameter much less than the diameter of the cup shaped blank 41. The die 72 is provided with an upper inner corner 74 which is square cut so as to define a shearing edge. 7

The die unit 70 also includes a vertically reciprocal punch 75 which is provided with a lower portion 76 of a reduced diameter. The lower portion 76 is provided with a sharp corner 77 defining a shearing edge. The corner 77 cooperates with the corner 74 of the die 72 to sever from the bottom of the cup shaped blank 41 a disc 78. This leaves at the bottom of the blank 41 an annular flange which is the roller retaining flange 22 of the final bearing cup 20. The cup shaped blank 41 is otherwise not worked upon by the die. unit 70. The die unit also includes a vertically reciprocal stripper 80 which is telescoped over the punch 75.

The die unit at the next station of the punch press for forming the bearing cup 20 is generally referred to by the numeral 81. The die unit 81 includes a die holder 82 in which there is mounted a die 83 having a bore 84 therethrough and a rounded upper corner 85. The bore 84 is of a size to freely receive the major portion of the cup shaped blank 41 while being of the necessary size for sizing and straightening up the large diameter portion 49 which is re-drawn as it is moved into the die 83.

The die unit 81 also includes a punch 86 and a stripper 87 which is telescoped over the punch 86. The punch 86 and thestripper 87 are mounted for vertical reciprocatory movement with respect to the die 83. The punch 86 is of a stepped construction and includes a lower portion 88 of a diameter to be snugly received Within the lower portion of the blank 41. The punch 86 also includes a larger diameter intermediate portion 89 which cooperates with the wall of the die 83 to re-draw the large diameter upper portion 49 of the blank 41. The upper portion 90 of the punch 86 is of a still greater diameter than the intermediate portion 89 whereby a sharp folding of the material of the blank 41 occurs at the upper end of the large diameter upper portion 49 where it intersects with a waste portion 91 of the blank.

Referring now to FIGURE 9, it will be seen that there is illustrated a die unit which is generally referred to by the numeral 92. The die unit 92 receives the cup shaped blank 41 from the die unit 81 and includes a die holder 93 in which there is mounted a die 94. The die 94 has a bore 95 therethrough which is of a stepped configuration in accordance with the general configuration of the cup shaped blank 41. The die 94 is provided at its upper end with a sharp .inner corner 96 which defines a shearing edge.

The die unit 92 also includes a punch 97 which is' mounted for vertical reciprocatory movement. The punch 97 is telescoped within a tubular stripper 98 which is also mounted for vertical reciprocatory movement. The punch 97 has a lower portion 100 of a stepped configuration for reception within the cup shaped blank 41. The intermediate part of the punch 97 is outwardly stepped to define an outer sharp corner 101 of a diameter to cooperate with the shearing edge of the die 94 at the corner 96. The sharp corner 101 of the punch 97 also functions as a shearing edge. It will be readily apparent that the die 94, in cooperation with the punch 97, shears off the waste portion 91 from the remainder of the cup shaped blank 41.

The trimmed cup shaped blank 41 is next transferred to a die unit which is generally referred to by the numeral 102. The die unit 102 includes a die holder 103 in which there is mounted a stepped die 104. The die 104 has a stepped bore 105 ,therethrough which conforms generally :to the configuration of the cup shaped blank 41.

The die unit 102 also includes a punch 106 which has a lower portion 107 of a diameter to be snugly received within the lower portion of the blank 41. The punch 106 alsoincludes a larger diameter intermediate portion 108 which, together with the lower portion 107, defines a downwardly facing annular shoulder 109 which opposes the upper edge of the cup shaped blank 41. It will be readily apparent from FIGURE 10 that when the vertically reciprocal punch 106 is moved down into the die 104 with the blank 41, the intermediate portion .50 of the blank will become seated against the shoulder 110 of the die 104, after which the shoulder 109 of the punch 106 will transmit a downwardly directed force on the extreme uppervend of the blank 41 so as to force the large diameter upper portion 49 downwardly with respect to the remainder of the blank 41 and thus square the corners of the intermediate portion 50.

In FIGURE 11 thereis illustrated'adie unit, generally referred to by the numeral 111, which receives the shaped blank 41 from the die unit 102. The die unit lllincludes a die holder 112 in which there is mounted a cylindrical die 113 having a bore 114,therethrough of a size to snugly receive the lower portion of the blank 41. v

The die unit 111 also includes a punch member 115 which is provided in the lower end thereof with an upwardly tapering socket 116 defined by an internal wall 117 of the punch member 115. The punch member 115, whichis mounted for vertical reciprocatory' movement, is brought down towardsthe cup'shaped blank 41 which has the intermediate portion 50 thereof seated on the upper end of the die 113. When the wall 117 engages the large diameter upper portion 49, the upper portion 49 is gradually folded inwardly to the position shown in FIG- URE 11.

At the final station of the punch press for forming the bearing cup there is a die unit which is generally referred to by the numeral 118. The die unit 118 includes a die holder 120 in which there is mounted a cylindrical die 121 which corresponds to the die 113. The die 121 has a bore 122 which snugly receives the lower portion of the cup shaped blank 41 which is now in its final shaping phases. The cup shaped blank 41 is received within the die 121 until the intermediate portion 50 thereof rests upon the upper end of the die 121.

The die unit 118 also includes a vertically reciprocable punch member 123 which cooperates with the die 121. The punch member 123 has a reduced diameter lower end portion 124 and a large diameter intermediate portion 125. The portions 124 and 125 of the punch member 123 cooperate to define a shoulder 126 which faces downwardly and which is upwardly and inwardly tapered.

When the punch member 123 is brought down against the cup shaped blank 41, the shoulder 126 engages the partially folded inwardly directed large diameter upper portion 49 of the blank 41 and progressively folds it to a position lying in a plane normal to the axis of the die 121 and .parallel to'the roller retaining flange 22. The large diameter upper portion'49 now becomes the roller retaining flange 25. The opening through the roller retaining flange is accurately sized by the reduced diameter lower portion of the punch member 123; v

'Whenthe punch member 123 comes to its fully lowered position, the roller retaining flange is pressed tightly against 'the' outwardly offset'portion of the bearing cup 20, which offset portion becomes the bearing cup restraining flange 23. In the inward folding of the large diameter upper 'portion 49 to form the retaining flange 25, there is a bending of the. metal of the blank41 to define the reversely curved portion 24 between the flange 23 and the flange 25. Y i I After the bearing cup 20 has been moved from the die unit 118, it is passed through conventional bearing cup treating processes including cleaning, hardening, etc. before it is ready for receiving rollers.

Although each'of the many die units has been described as having a die holder, .it is to be understood that all of the die units maybe part of a single punch press with the result that the die holders may be of a unitary construction.'Als-o, it is to be understood that all of the punches may be carried by a single platen and vertically'reciprocated in unison. The manner in which the blank is transferred'from one die unit to the other has not been specifically described in that this is accomplished in a conventional 'r'nannerwhich is not part of this invention. M

Although onlya preferred embodiment of the invention has been specifically illustrated and described herein, itv is tolb'e understood that minor variations may be made therein within the spirit and scope of the invention, as 'defined in the appended claims.

What is claimed as new:

1. In a'method of forming a bearing cup of the type which includes a' cylindrical body having an inwardly tion becoming the restraining flange.

directed retaining flange at one end thereof and an outwardly directed restraining flange adjacent the retaining flange, the steps of forming a sleeve having an end portion of an increased diameter, forming an annular intermediate portion perpendicular to the axis of the sleeve, and then folding said end portion inwardly in parallel, adjacent, reversely folded relation to said annular intermediate portion with the folded end portion becoming the inwardly directed retaining flange and the intermediate portion becoming the outwardly directed restraining flange.

2. In a method of forming a bearing cup of the type which includes a cylindrical body having an inwardly directed retaining flange at one end thereof and an outwardly directed restraining flange adjacent the retaining flange, the steps of forming a sleeve having an end portion of an increased diameter connected to the remainder of the sleeve by an annular intermediate portion, inwardly folding said end portion to a generally frusto-conical shape, and then folding said end portion inwardly in reversely folded relation to said annular intermediate portion with the folded end portion becoming the retaining flange and the intermediate portion becoming the restraining flange.

3. In a method of forming a bearing cup, the method of forming a sleeve having a large diameter end portion connected to the remainder of the sleeve by an intermediate portion having sharp corner connections with the end portion and the remainder of the sleeve comprising the steps of providinga sleeve having an enlarged end portion and an offset intermediate portion, snugly seating the sleeve in a shouldered die with said ofliset intermediate portion overlying the shoulder of the die,

internally restraining the sleeve against inward movement, andapplying an-endwise force on the edge of said enlarged end portion to collapse said intermediate portion against the die shoulder. a I

4. In a method of forming a bearing cup of the type which includes a cylindrical body having an inwardly directed retaining flange at one end thereof and an outwardly directed restraining flange adjacent the retaining flange, the steps of forming a sleeve having an end portion of an increased diameter connected to the remainder of the sleeve by an outwardly directed annular intermediate portion, and then folding said end: portion inwardly past the innermost portion of said intermediate portion in reversely folded relation to said annular intermediate portion while internally restraining the end portion to size the same and with the folded end portion becomingthe retaining flange -and the intermediate por- 5. A method of. forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing-aflat blank, drawing the central part of the blank to a cup shape with a large diameter outwardly flared end portion,

drawing the blank end portion to a large diameter cylindrical shape connected to a main 'portion'of the blank 'by anoutwardly oflset annular intermediate'portion', and

then folding said end portion inwardly into a flattened portion in reversely folded" relation to said'a'nnularintermediate portion with the flattened end portionbecoming the retaining flange and the intermediate portion becoming the restraining flange. 3 r

6. A method of forming -a bearing cup which includes a cylindrical body having-inwardly directed roller retaining flanges at the opposite ends'thereof and an outwardly directed restraining flange adjacent one. of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to acup shape with a large diameter end portion,.drawing the blank end portion to a large diameter cylindricalshape connected to a main portion of the blank'by an outwardly offset annular intermediate portion, inwardly folding said end portionto a generally frusto-conical shape, and then folding" said end portion inwardly in reversely folded relation to said annular intermediate portion with the folded end portion becoming the retaining flange and the intermediate portion becoming the restraining flange.

7. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape with a large diameter end portion, drawing the blank end portion to a large diameter cylindrical shape connected to --.a main portion of the blank by an outwardly offset annular intermediate portion, snugly seating the cup shaped blank in a shouldered die with the blank offset portion overlying the shoulder of the die, internally restraining the blank against inward movement, applying an endwise force on the edge of the enlarged end portion to collapse said offset portion against the die shoulder, and then folding said end portion inwardly in reversely folded relation to said annular intermediate portion with the folded end portion becoming the retaining flange and the intermediate portion becoming the restraining flange. 8. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape with a large diameter end portion drawing the blank end portion to a large diameter cylindrical shape connected to a main portion of the blank by an outwardly offset annular intermediate portion, trimming off the excess of said blank at the remote end of the enlarged end portion, snugly seating the cup shaped blank in a shouldered die with the blank offset portion overlying the shoulder of the die, internally restraining the blank against inward movement, applying an endwise force on the edge of the enlarged end portion to collapse said offset portion against the die shoulder, and then folding said end portion inwardly in reversely folded relation to said annular intermediate portion with the -folded end portion becoming the retaining flange and the intermediate portion becoming the restraining flange.

9. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, redrawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an intermediate offset portion and an outer end portion, further re-drawing the cup shaped portion of said blank to decrease the diameter thereof and square up the intersection of the wall and bottom thereof, flattening the offset intermediate portion, removing a major part of the bottom of said cup shaped portion to define the other of the roller retaining flanges, drawing and shaping the outer end portion, trimming off excessof the blank beyond said enlarged end portion, squaring up said offset intermediate portion by applying an endwise force on saidouter end portion while holding said cup shaped portion against movement, gradually folding said outer end portion inwardly to a frusto-conical configuration, and then flattening said outer end portion against said offset portion from said frusto-conical configuration into a plane perpendicular to the axis of the cup with said offset portion forming said restraining flange and said flattened outer end portion forming said one roller retaining flange.

10. The method of claim 9 wherein said outer end portion is internally sized as it is flattened.

11. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, redrawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an intermediate offset portion and an outer end portion, drawing and shaping the outer end portion, squaring up said offset intermediate portion with respect to said cup shaped and outer end portions by applying an endwise force on the edge of said outer end portion While holding said cup shaped portion against movement, and then flattening said outer end portion against said offset portion with said offset portion forming said restraining flange and said flattened outer end portion forming said one roller retaining flange.

12. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, redrawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an intermediate offset portion and an outer end portion, removing a major portion of the bottom of said cup shaped portion to define the other of the roller retaining flanges, drawing and shaping the outer end portion, squaring up said offset intermediate portion with respect to said cup shaped and outer end portions by applying an endwise force on said outer end portion whiletholding said cup shaped portion against movement, and then flattening said outer end portion against said offset portion with said offset portion forming said restraining flange and said flattened outer end portion forming said one roller retaining flange.

13. A method of forming a bearing cup which includes .a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, redrawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an intermediate offset portion and an outer end portion, drawing and shaping the outer end portion, and then flattening the whole of said outer end portion into a plane parallel and adjacent to said offset portion with said offset portion forming said restraining flange and said flattened outer end portion forming said one roller retaining flange.

14. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, redrawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an intermediate offset portion and an outer end portion, drawing and shaping the outer end portion, trimming off excess of the blank beyond said enlarged outer end portion, squaring up said offset intermediate portion with respect to said cup shaped and enlarged outer end portions by applying an endwise force on said enlarged outer end portion while holding said cup shaped portion against movement, gradually folding said enlarged outer end portion inwardly to a frusto-conical configuration, and then flattening said enlarged outer end portion against said offset portion with said offset portion forming said restraining flange and said flattened enlarged outer end portion forming said one roller retaining flange.

15. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, redrawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an intermediate offset portion and an enlarged outer end portion, drawing and shaping the enlarged outer end portion, squaring up said offset intermediate portion with respect to said cup shaped and enlarged outer end portions by applying and edgewise force on said enlarged outer end portion while holding said cup shaped portion against movement, gradually folding said enlarged end portion inwardly to a frustoconical configuration, and then flattening said enlarged outer end portion against said offset portion with said offset portion forming said restraining flange and said flattened enlarged outer end portion forming said one roller retaining flange.

16. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, redrawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an intermediate offset portion and an enlarged outer end portion, further re-drawing the cup 'shaped portion of said blank to decrease the diameter thereof and square up the intersection of the wall and bottom thereof, flattening the offset intermediate portion, removing a major part of the bottom of said cup shaped portion to define the other of the roller retaining flanges, drawing and shaping the enlarged outer end portion, squaring up said offset intermediate with respect to said cup shaped and enlarged outer end portions by applying an endwise force on said enlarged outer end portion while holding said cup shaped portion against movement, and then flattening said enlarged outer end portion against said offset portion with said offset portion forming said restraining flange and said flattened enlarged outer end portion forming said one roller retaining flange.

17. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, re-

drawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an intermediate offset portion and an enlarged outer end portion, further redrawing the cup shaped portion of said blankto decrease the diameter thereof and square up the intersection of the wall and bottom thereof, flattening the offset intermediate portion, drawing and shaping the enlarged outer end portion, squaring up said offset intermediate portion with respect to the cup shaped and enlarged outer end portions by applying an endwise force on said enlarged end portion while holding said cup shaped portion against movement, gradually folding said enlarged outer end portion inwardly to a frusto-conical configuration, and then flattening said enlarged outer end portion against said offset portion with said offset portion forming said restraining flange and said flattened enlarged outer end portion forming said one roller retaining flange.

18. A method of forming a bearing cup which includes a cylindrical body having inwardly directed roller retaining flanges at the opposite ends thereof and an outwardly directed restraining flange adjacent one of said retaining flanges comprising the steps of providing a flat blank, drawing the central part of the blank to a cup shape, redrawing the cup shaped portion of said blank to reduce the diameter thereof and increase the depth thereof and defining generally an inter-mediate offset portion and an outer end portion, further re-drawing the cup shaped portion of said blank to decrease the diameter thereof and square up the intersection of the wall and bottom thereof, removing a major part of the bottom of said cup shaped portion to define the other of the roller retaining flanges, drawing and shaping the outer end portion, trimming off excess of the blank beyond said outer end portion, and then flattening the whole of said outer end portion into a plane parallel and adjacent to said offset portion with said offset portion forming said restraining flange and said flattened outer end portion forming said one roller retaining flange.

References Cited UNITED STATES PATENTS 216,731 6/1879 Edmands 72-358 412,389 10/1889 Isherwood 72-358 927,311 7/ 1909 Anderson 72-348 1,477,164 12/ 1923 Close 29-148.4 1,867,412 7/1932 Klocke 113-120 2,434,905 1/ 1948 Burt et a1. 72349 3,070,058 12/1962 Boyer 72-356 RICHARD J. HERBST, Primary Examiner. 

1. IN A METHOD OF FORMING A BEARING CUP OF THE TYPE WHICH INCLUDES A CYLINDRICAL BODY HAVING AN INWARDLY DIRECTED RETAINING FLANGE AT ONE END THEREOF AND AN OUTWARDLY DIRECTED RESTRAINING FLANGE ADJACENT THE RETAINING FLANGE, THE STEPS OF FORMING A SLEEVE HAVING AN END PORTION OF AN INCREASED DIAMETER, FORMING AN ANNULAR INTERMEDIATE PORTION PERPENDICULAR TO THE AXIS OF THE SLEEVE, AND THEN FOLDING SAID END PORTION INWARDLY IN PARALLEL, ADJACENT, REVERSELY FOLDED RELATION TO SAID ANNULAR INTERMEDIATE PORTION WITH THE FOLDED END PORTION BECOMING THE INWARDLY DIRECTED RETAININGG FLANGE AND THE INTERMEDIATE PORTION BECOMING THE OUTWARDLY DIRECTED RESTRAINING FLANGE. 